Blister packaging is a common form of tablet/capsule packaging in the pharmaceutical industry, consisting of plastic hard sheets (such as PVC) and aluminum foil covers, which form independent cavities through compression molding to encapsulate medicines.
In the inspection process, low-contrast defects pose major challenges: Issues like bubble leakage caused by poor cavity lamination and tiny aluminum foil damages are hard to identify due to their slight difference from the background. Tiny tablet defects or foreign objects like hair mixed in are also often obscured by cavity shadows. Meanwhile, in high-speed production scenarios (e.g., 400 pieces/minute), it is necessary to balance inspection accuracy and efficiency. Traditional manual inspection or basic algorithms are prone to missed and false detections, and parameters need to be re-adjusted during product changeovers, resulting in poor adaptability.
